# coefficient

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## coefficient

[ko″ĕ-fish´ent]
1. an expression of the change or effect produced by the variation in certain variables, or of the ratio between two different quantities.
2. in chemistry, a number or figure put before a chemical formula to indicate how many times the formula is to be multiplied.
absorption coefficient absorptivity.
Bunsen coefficient the number of milliliters of gas dissolved in a milliliter of liquid at atmospheric pressure (760 mm Hg) and a specified temperature. Symbol, α.
confidence coefficient the probability that a confidence interval will contain the true value of the population parameter. For example, if the confidence coefficient is 0.95, 95 per cent of the confidence intervals so calculated for a large number of random samples would contain the parameter.
correlation coefficient a numerical value that indicates the degree and direction of relationship between two variables; the coefficients range in value from +1.00 (perfect positive relationship) to 0.00 (no relationship) to −1.00 (perfect negative or inverse relationship).
diffusion coefficient see diffusion coefficient.
coefficient of digestibility the proportion of a food that is digested compared to what is absorbed, expressed as a percentage.
dilution coefficient a number that expresses the effectiveness of a disinfectant for a given organism. It is calculated by the equation tcn = k, where t is the time required for killing all organisms, c is the concentration of disinfectant, n is the dilution coefficient, and k is a constant. A low coefficient indicates the disinfectant is effective at a low concentration.
linear absorption coefficient the fraction of a beam of radiation absorbed per unit thickness of absorber.
mass absorption coefficient the linear absorption coefficient divided by the density of the absorber.
phenol coefficient see phenol coefficient.
sedimentation coefficient the velocity at which a particle sediments in a centrifuge divided by the applied centrifugal field, the result having units of time (velocity divided by acceleration), usually expressed in Svedberg units (S), which equal 10−13 second. Sedimentation coefficients are used to characterize the size of macromolecules; they increase with increasing mass and density and are higher for globular than for fibrous particles.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

## co·ef·fi·cient

(kō'ĕ-fish'ĕnt),
1. The expression of the amount or degree of any quality possessed by a substance, or of the degree of physical or chemical change normally occurring in that substance under stated conditions.
2. The ratio or factor that relates a quantity observed under one set of conditions to that observed under standard conditions, usually when all variables are either 1 or a simple power of 10.
[L. co- + efficio (exfacio), to accomplish]
Farlex Partner Medical Dictionary © Farlex 2012

## coefficient

Vox populi A variable or factor which allows the calculation of a property or quantity of a substance under various conditions. See Absorption coefficient, Activity coefficient, Adsorption coefficient, Attenuation coefficient, Dice coefficient of similarity, Inbreeding coefficient, Intraclass correlation coefficient, Mass attentuation coefficient, Mass energy absorption coefficient, Octanol-water partition coefficient, Spearman's rank (order) correlation.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

## co·ef·fi·cient

(kō'ĕ-fish'ĕnt)
1. The expression of the amount or degree of any quality possessed by a substance, or of the degree of physical or chemical change normally occurring in that substance under stated conditions.
2. The ratio or factor that relates a quantity observed under one set of conditions to that observed under standard conditions, usually when all variables are either 1 or a simple power of 10.
[L. co- + efficio (exfacio), to accomplish]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Navarro, "Heuristic UTD coefficients applied for the channel characterization in an Andean Scenario," in 2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, Vancouver, BC, Canada, July 2015.
Guevara et al., "Comparison of heuristic UTD coefficients in an outdoor scenario," in 2015 9th European Conference on Antennas and Propagation (EuCAP), pp.
Furthermore, the correction vector can be calculated by applying (26) in (25), and the improved estimate of the vector X of the N unknown coefficients in the (k + 1)th iteration based on the correction vector [DELTA]X and the vector X obtained in the kth iteration can be carried out as
then the vector X of the N unknown coefficients equals to the vector [X.sup.(k)].
In 1951, Lee Cronbach proposed the alpha coefficient ([alpha]) as an estimate of the proportion of variance of a measurement instrument caused by the common factor among items.
The friction performance test compared the influence of the wood moisture content and load on the friction coefficient with different microstructure.
Where G and P are AG and PE (co)variance square matrices, respectively, of RR coefficients; [cross product] is the Kronecker product; A is the AG relationship for animals; I is the identity matrix for cows; and R is a diagonal matrix of residual variance for each record.
Correlation coefficient is an important decision making apparatus in statistics to evaluate the relation between two sets.
where [a.sub.D] and [b.sub.D] are dimensionless coefficients. By comparing (3) to (2), one can obtain [a.sub.D] = 12 and [b.sub.D] = b[beta].
Since in S coefficients the highest energetic portion is located in S (1, 1), the image blocking can be a good idea.

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